Telephone attachment.



I J. L. McMlLLAN.

TELEPHONE ATTACHMENT.

APPLIGATTON man MAYE. 1914.

Patented Jan. 16,1917.

2 SHEETS-SHEET I.

qftox new J. L. ,McMlLLAN. TELEPHONE ATTACHMENT. I APP. L|CATION FILED MAY 6.19M.

Patented J an. 16 1917.

2 SHEETS-SHEET 2.

UNITED srrnrrns r rnnr OFFICE;

worm L. MQMILLAN, or SYRACUSE, new Yonx.

rnrnrnonn ATTACHMENT.

Specification of Letters Patent,

Application filed Kay 6, 1814. Serial Ro. 836,639.

out requiring the attachment of any parts to either the receiver or receiver hook. An additional advanta e is the ready disconneo tion of the amplifier by merely removing the receiver from the hook for use in the or dinary way. i

- In prior amplifying devices the amplifier has usually been connected, to the receiver and the devices for operating the receiver hook switch have commonly been connected with the receiver hook. It is often desirable to use the telephone without the ampliher, which cannot readily be done when it telephone is connected to thereceiver, and the telephone companies usually'forbid the attach-- ment of any mechanisms to the working parts of their telephones, so that the use of theise prior devices has been somewhat lim ite Broadly stated my invention comprises an amplifying horn which is so mounted as to be manually movable first to contact with the ear-piece of the receiver as the latter hangs on the hook, and then by a continued movement to lift the receiver and permit upward. movement of: the book so that the tele hone is connected. An impositive late ing device may be provided to hold the Y horn in its upper andv lower positions.

The device is a plicable to any telephone in which the receiver hangs on. aswitch-opcrating hook but I illustrate it as applied to the familiar desk set in the accompanying drawings, in which-- I Figure 1 is a perspectiveview of a device embodying my invention, the position of the telephone being indicated in dotted lines; Fig. 2 is a fragmentary elevation of a telephone with my invention attached, the re-' ceiver bein in its lower Eosition with the nnccted; ig. 3 is a view similar to 2 showing the receiver lifted to connect the telephone; Fig. 4 is a section of the complete dcvicegrand Fig. 5 a

560+ tron on the line 5-5 of Fig. 4.

Patented Jan. 16, 1 9 17'.

The device is supported on a base plate [5 provided with screw held clamp fingers or lugs 7 to engage the base 8 of the telephone.

An upstanding bracket or case '9 on the base plate carries a fulcrum 10 for a hanger 11 in which is clamped the neck tube 12 of the resonator horn. This neck tube 12 extends forwardbetwten the armsof a latch or retaining spring 13 of the form clearly shown in Fig.5, the spring operating as an; impositive latch to hold the neck tube in its raised and loweredositions. At its for: ward end the neck tu e 12 curves upwardly and terminates in a cup 14 having a pad 15, j

the on p and pad being of such proportwns and so POSllJlOIlBd with relationto a tele-" phone clamped on the base 6 as read' to.

contact with the ordinary ear-piece 16 o the telephone receiver 17, as this h n book 18. A handle 19 is provide?! onvthe I to per mit ready manual lifting andloiveringbf themeck tube. The rear end of the neck tube 12 is curved upward and forward at 20 and carries a removable amplilgifghorn 21.which may be of any desired When the tube 12 is in its loweres posi tion it is impo'sitively held by the spring 13.

The cup 14 and using the telephone the receiver ma either be lifted from the hook and la to the ear in the usual way or the hen 1e 19 me be ad 15 are then virtually out of contact with theeanpiece 16. "In

lifted to raise the neck tube 12 un itlatches in its upper position. In such up-' per position "-t e ear-piece 16 will rest squarely on the pad l5 and the receiver 17 will be so elevated as to release hook 18 and cause its connected switch to connect the telephone] This brings thodiaphragm of the receiver into direct connection with the neck tube 12 and the connectedampliiier' or resonator 21 so that the telephone maybe heard at a considerable distance. I

The advantages of the device willbe'obvious, the features ofparticulcr importance being the posaibilit of use in the ordinary way and the avoi once of all mechanical connections to any of the working parts of the telephone.

Havin thus described my invention, what I c aim is:--

1. The combination with a telephone desk set including a base, a receiver hook switch supported thereby and a receiver carried by said hook. switch; of a separate and detachable support for said base; an. amplifying horn pivotally mounted on said support and .having a mouth piece adapted to move into" operative relation with the ear piece of the receiver and then lift said receiver to free the hook switch; and a latch for'holding said horn in said last named position.

2; The combination with a telephone desk set including a base, a hook switch carried thereby and a receiver supported by the hook switch; of a supporting member re leasably clamped to said base; a sound amplifying horn pivotally mounted on said support having a mouth piece movable by the movement of said. horn to engage the ,ear piece of said receiver and then lift the latter to free the hook switch; and an impositive latch for alternately holding said horn in and out of its receiver elevating position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN L. MQMILLAN. Witnesses:

THEODORE A. DOEHNER, VV LrREn W. PORTER, Jr. 

